<!DOCTYPE html>
    <html lang="zh-CN">
    <head>
      <meta charset="UTF-8">
      <meta name="author" content="wangbo">
      <meta http-equiv="X-UA-Compatible" content="IE=edge">
      <meta name="viewport" content="width=device-width, initial-scale=1.0">
      <title>Document</title>
     <style>div{color: red;}</style>
    </head>
    <body>
      <div>我是div</div>
    </body>
    </html>